While Bitfinex got hacked in the past and they definitely did some really shady stuff with Tether(USDT), I think we should treat all exchanges almost the same- with the assumption that they will be hacked someday. With that said, I'd probably trust Coinbase Pro or Kraken significantly more compared to Bitfinex, as I doubt the Tether controversy wouldn't be their last shady move yet. The move they did with the IEO just to have funds to back the Tethers was just something else.